Hand drill



Jan. 31, 1933. E. HARCHARICK HAND DRILL Filed July 17, 1930Z-Sheets-Sheet 1 133 120 fi/maimvcm A llomey Jan. 31, 1933. E,HARCHARICK 1,895,990

HAND DRILL Filed July 17,1930 2 Sheets-Sheet 2 A llorney UNITED STA 1 momomma, or WILKES-BARBIE, PENNSYLVANIA HAND D3111.

Application: flled Jul 17,

This invention relates to new and useful improvements in hand drills,breast drills and similar manually operated drills as distinguished frompower driven machine drills, and more particularly itpertains to a newand novel mechanism for supporting the drill in operative positionrelative to the work operated upon thereby. i c

It is one of the objects of the invention to provide meansfor supportinga drill rigidly in true operative position whereby to increase theeiiiciencyof the drill, and insure accuracy of the work-performed therebIt is .a further object of the invention, so to construct the devicethat it may be used in connection with any type of drill.

- It is afurther object of the invention to provide means whereby thedrill may be adj ustably secured to the device.

It is a further object of the invention to provide means associatedwith'the device for securely holding the work operated upon by thedrill.- I

A still furtherobject of the'invention resides in means for yieldablysupporting the drill relative to-the work, and also in means" for adjustably mounting saidfresilient means in order that the drill may beproperly supportedjwith respect to the work operated 3011011 I With theabove and other objects in view "which will appear as the nature of theinvention is better understoodfrefereme is had to the accompanyingdrawings in which, 9 Figure 1 is a view in elevation of a deviceconstructed in. accordance with invention, 7

Figure 2 is a longitudinal sectional view taken onthe line2 2 of Figure1,

Figure 3 isa horizontal sectional view taken on the line 3+3 of Figure1,

Figure 4 is a perspective view of a device constructed in accordancewith the invention, the drill being removed therefrom, and;

Figure 5 is a detail view partly in section and partly in elevationshowing the specific construction of the device.

Referring more particularly to the draw- 5 ings, the device comprises abase or foot 10, and said base or foot 10 is provided with a the present193th. Serial e. 468,667.

body portion 16' cut out as at 17 in order to render the same of lighterconstruction. Thebody portion 16 carries a plurality of. ears 18preferably extending at right angles to the body portion, and said ears18 are .per-

forated for the receptionof the'standards 13 as more clearly illustratedin Figure 5.

Carried by each of the standards 13, and positioned between theperforated ears 18 of; the drill carriage 15,there is a collar 19, andthese collars are adapted toxbe secured to theirrespective standards 13againstmovements relative thereto by set screws. or the like 20."Mounted or resting upon each of the collars 19, there. is a coil spring21 and as more clearly illustrated in Figures 1 and 4,.the upper ends ofthese coil springs 21 are adapted to engage the under face of theupperlugs18 of the drill carriage 15. By this means, it will be apparentthat the drill carso riage 15 is yieldably? supported upon thestandards- 13, since its weight rests upon the springs 21. Movement ofthe drill carriage 15 in the direction of the base 10, will place thecoil springs 21 under compression, and these coil springs 21, will serveto return the -drill carriage 15 to its normal or initial position uponrelieving the pressure thereon.

The drill carriage 15 is providedwith aplurality of elongated slots 25and 26, and mounted in these slots, and secured to the drill carriage 15by means of wing nuts 27 and 28 respectively, there are two means 29 and30which are adapted for engagement with ahand drill, breast drill orsimilar tool, r

to secure the same to the drill carriage 15. The securing means 29preferably'comprises abolt 30 mounted in the slot26, and said bolt has ahead 31 which is adapted to pass through the shank 32 of the drill asbest wing nut 27 is mounted upon this screw threaded shank 37. By thismeans, a drill may be secured in the drill carriage in the mannerillustrated in Figures 1 and 2, and when secured in place the drill willbe rig- 15 idly carried by the drill carriage 15 which as heretoforestated is yieldably supported upon the coil springs 21.

From the foregoing description, it will be apparent that with a drillmounted in the drill carriage 15 as described, the drill is movabletowards and away from the base member 10, and that it is moved in thedirection of the base member 10 by pressure applied to the drill, andwill be automatically moved in the direction away from the base member10 by the springs 21 which are compressed as the drill is moved towardthe base member 10. The base member 10 is provided with an openingthrough which the bit 41 '3 of the drill passes in operation.

The collars 19 heretofore mentioned are adjustably mounted upon thestandards 13, and by this arrangement, it will be apparent that thedownward movements of the drill 35 carriage 15 may be determined by theposition of the collars 19, since when the springs 21 are placed underfull compression, the carriage 15 can no longer move in the direction ofthe base 10 and thus an adjustment of the collars 19 will limit themovement of tihe carriage 15 in the direction of said base Means isprovided to secure the work against movement relative to the base 10dur- 45 ing operation thereon, and in the present embodiment of theinvention, this means is illustrated as an arm 45 slidably mounted as at46 upon one of the standards 13. This arm 45 is provided with a wing nut47 by means of which it may be secured in position upon the standards13, and as will be noted, the arm 45 has movements both longitudinallyand circumferentially of the standard 13 upon which it is mounted.

If desired, a subbase 50 may be employed,

and in the present illustration, this sub base includes angle irons suchas 51 beneath which the base 10 is adapted for engagement as illustratedin the drawings. By this means,

protection to the bit 41 as it passes through the work and the opening40 is provided.

From the foregoing, it will be apparent that the present inventionprovides a new and novel means for supporting a hand drill press 95drill or similar tool in operative position, and

that said means provides for accurate and efficient work of the tool.Furthermore it will be apparent that the device is capable of use inconnection with any type of hand drill, breast drill and similar toolwithout necessitating any change in construction of the device. 7

While the invention has been herein illustrated in what may be termed apreferred form, it is to be understood that the invening a plate ofarcuate shape in cross section,

and having a pairof outwardly extending ears at each end thereof, saidearsbeing pro vided with openings through which the up rights pass,'acollar adjustably connected to. each upright and located above a lowerear,

springs on the uprights having their lower ends engaging the collars andtheir upper ends contacting the upper ears, the arcuateshaped part ofthe said plate having ver-' tically arranged slots therein, drillholding members located in the space formed by the concavity of theplate and having threaded shanks extending through the slots, nutmembers on said shanks, for clamping the holding members in adjustedposition in the slots. 2. A drill holder comprising a plate-like base, apair of socket members connected to the upper face of said base, a pairof rods having their lower ends fitting in the socket members, setscrews for holding the said lower ends in said socket members, acarriage of substantially arcuate shape in cross section, upper andlower pairs of cars extending outwardly from the ends of the carria eand having openings therein through which the rods pass, a collaradjustably connected to each rod and located above an ear of each lowerpair, springs on the rods havin their lower ends contacting the collarsanc their upper ends contacting the upper ears, adjustable means carriedby the carriage and extending into the space formed by the arcuateportion ofthe carriage for holding a drill, and a sub'base havingguideways thereon for receiving the edges of the first-mentioned base.

In testimony whereof I affix my signature.

EMRO HARCHARICK.

